The Type 056 stealth frigate has a sleek design that helps it evade radar detection, and needs just one-third of the crew used by its predecessor.

BBC: China navy launches new stealth frigate

The RQ-170 Sentinel was the type of stealth drone used to conduct surveillance on the compound used by Osama bin Laden in Abbottabad, Pakistan, before the May raid by Navy SEAL commandos that killed the al Qaeda leader.

WSJ: Iran Says It Shot Down Unmanned U.S. Plane